Piston skirt coatings?

A good proportion of friction losses in an engine come from piston skirt/ liner contact. Coatings used in race engines are to reduce this friction loss. Not really worth the trouble in a 99 dommie.

Remember STP!

Previously robert_tuck wrote:

Don't want to go faster,just to run quieter.

Don't think coatings will help you. just love your dommie and accept the noise.

You could always just buy ear plugs. Much cheaper!

silicon-based firecoat VHT 400g spraycan witch has been tested to 650F temperatures witch you can by off E-bay.co.uk yours anna j

It is a car spray paint for High Temperature applications. I really would n't try this on your pistons.

Previously Charles Bovington wrote:

It is a car spray paint for High Temperature applications. I really would n't try this on your pistons.

hello it's not an externalcar spray but made for internalengine parts as its high-temperature siliconebased or ceramic coating like extreme coating others like camcoat and others useyour computer for more information has used in Nascar yours anna j

I would have thought that 0.0045" was a good clearance for an air cooled engine, reducing it further may end in tears, Check that the slap isn't the carb slides rattling or something else.

Why coating the pistons? They shouldn't get in contact with the barrel, because there has to be oil.

Fritz

Previously anna jeannette Dixon wrote:

Previously Charles Bovington wrote:

It is a car spray paint for High Temperature applications. I really would n't try this on your pistons.

hello it's not an externalcar spray but made for internalengine parts as its high-temperature siliconebased or ceramic coating like extreme coating others like camcoat and others useyour computer for more information has used in Nascar yours anna j

It is used for insulation of high temperature exhaust systems and has been used on piston crowns. But use on the skirts at your peril! Other expensive coatings may be applied to skirts (piston) but I fail to see the point on a 99 dommie. Will not cure piston slap. 40-60 % of engine friction losses are from piston / piston skirt contact with the liner. There is an oil film formed between rings and liners because of the wedge or barrel shape of the ring profile but little between the skirt and the liner.